Loose headstock of a lathe



Patented Feb. 14, 1950 JohanY Greorge` Kronouei= assi'gnor,

EindhovenNetherlands, by mesne assignments, to Hartford National Bankand Trust Company, Hartford,

Conn., as trustee ApplicationMay 3, 194I3, Serial1No.y 667,036; In theNetherlands March 18, 1942 Section 1, Public Law 690, AugustS', 1946Patent expires March 18, 11962 to the attachment ofthis stock, which ismovable along the lathebedy tothe latter l It is well-known to-previdethelloose stockl with `a separate part availableinthefbed of the-lathe,

which part is movable relatively tothe stock. By means of a lever havingan eccentric this loose part may be moved relatively to the said loosestock in such manner that this stock such as the tail-stock is clampedto the bed of the lathe. After loosening this attachment the motion ofthe stock over the bed yet remains difcult, particularly with heavyhead-stocks.

The present invention has for its purpose to avoid this difficulty andis characterized in that at least one roller secured in a movable mannerto the stock is located between two slide faces in the bed and in oneposition bears on one of the slide faces so that the loose stock isclamped to the bed, whereas in another position of this roller itengages the other slide face and lifts the loose stock from the bed ofthe lathe.

The construction according to the invention yields the advantage thatthe said roller serves on the one hand for clamping the loose stock andon the other hand supports the loose stock on the bed of the lathe. Bymeans of this roller the loose stock is allowed to roll over the bed sothat it can be easily shifted.

The loose stock is preferably equipped with four of such rollers whichare provided pairwise on either side of this stock. In this case theloose stock can travel as a whole along the bed.

The invention will be more fully explained by reference to theaccompanying drawing representing, by way of example, one form ofconstruction thereof.

Figure 1 is a cross-sectional view of a loose lathe stock memberaccording to my invention taken along the line I-I of Figure 2 lookingin the direction indicated by the arrows.

Figure 2 is a side View in elevation of the means of Figure l takenalong the line 2-2 of Figure l.

In the drawing the reference number Ill designates the bed which isprovided on either side with a slot II whose upper and bottom face 23and 24 respectively are realised to constitute slide faces. Furthermorethe bed comprises a flat portion I9 and a V-shaped gutter 2l to whichthe loose head stock can be clamped. This V- shaped gutter .2| serves tofix the correct position of the loose stock in a direction at rightangles to the bed.

a loose stock member Theloose stock member such as a tail-stock memberIJ. comprises two ribs I5 and IIiwhich arev located atV some distancefrom the` side, wall of the stock; andgintegrally connected tov thesaidside-walls by means of the,A portion Irl-A (see Figure 2). Each` of.thesev ribs is perforated,v at two points and carries a `shaft I4.`'I-his shaft I4 has an eccentrically located cylindrical end I3 aboutwhich a roller I2 of hard steel is freely rotatable. This shaft I4 isrigidly connected to ther lever 22 which is movable in a space betweenthe said ribs and the side wall of the loose stock member. The shafts I4can be rotated by means of both these levers 22 at the same time bymeans of the connecting bar 22-A which results in that the eccentricpart I3 is moved upward and downward so that the hard steel rollers I2engage either the bottom slide faces 24 or the upper slide faces 23. Inthe first mentioned case the bottom sides IB and 2U respectively of theribs I5 and I6 are lifted from the bed. The weight of the stock I1 istransmitted solely through the rollers I2 to the bed so that the loosestock can travel over the bed by means of the rollers I2. By displacingthe levers 22 the rollers I2 are pushed against the slide faces 23 as aresult of which the at slide face I8 is at the same time pushed againstthe face I9 of the bed and the V-shaped shoulder 20 is pushed into theV-shaped groove 2l. The stock is now clamped to the bed.

What I claim is:

l. Stock apparatus for a lathe, which comprises a stock member havingside-wall portions and perforated rib portions in spaced-apart relation,a bed-like support member having a V- shaped gutter-like slot and squareslide slots parallel to each other and to the said wall portions and ribportions, lever members, shaft members attached to said levers at theends thereof and mounted for rotation in the said perforations andhaving eccentrically connected end portions, and roller members mountedfor rotation on the said eccentric end portions, said rollers bearing onthe top and bottom surfaces of the said square slots according to theextent and direction of the actuation of said levers.

2. Stock apparatus for a lathe, which comprises a stock member havingside-wall portions and perforated rib portions in spaced-apart relation,a bed-like support member having a V- shaped gutter-like slot and squareslide slots parallel to each other and to the said wall portions andsaid rib-portions, lever members, shaft members attached to said leversat the ends thereof and mounted for rotation in the said perthe saidstock member and said support member according to the extent anddirection of the actuaton of said levers.

3. Stock apparatus for a lathe, which comprises a stock member havingapertured sidewall portions and perforated rib portions in spaced-apartrelation, a bed-like support member having a raised central portion, aV-shaped gutter-like slot and square slide slots formed in the saidcentral portion parallel to each other and to the said Wall portions andsaid rib portions, lever members, shaft members attached to said leversat the ends thereof and mounted for rotation in the said perforationsand having eccentrically connected end portions, and roller membersmounted for rotation on the said eccentric end portions, said rollersbearing on the top and bottom surfaces of the said square slotsaccording to the extent and direction of the selective actuation of saidlevers.

4. Stock apparatus for a lathe, which comprises a stock member havingside-Wall portions and perforated rib portions in spaced-apart relation,a bed-like support member having a V- shaped gutter-like slot and squareslide slots parallel to each other and to the said wall portions andsaid rib portions, at least four lever members, shaft members attachedto said levers at the ends thereof and mounted for rotation in the saidperforations and having eccentrically connected end portions, and atleast four roller members mounted pairwise one behind the other forrotation on the said eccentric end portions, said rollers bearing on thetop and bottom surfaces of the said square slots according to the extentand direction of the actuation of said levers.

JOHAN GEORGE KRONOUER.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 185,682 Johnson Dec. 26, 1876364,307 See June '7, 1887 1,381,188 Gurv June 14, 1921 2,049,842 KlingAug. 4, 1936

